Design and research of a new hydraulic source circuit

6 Design and research of a new hydraulic source circuit Xu Xuexin, Lin Zhenzhen. Zhang Wei. Zhang Wei Liaoning Provincial Hydraulic Technology Institute, the hydraulic source circuit of 0003 electric accumulator in Shenyang City, Liaoning Province has obvious energy-saving effect. Through the analysis of the effective volume calculation method of the accumulator, the effective body of energy storage is found. The method, and based on this research, designed a new hydraulic source loop field 1 overview hydraulic hatred! The design of Lulu liquid taste system is the most basic. From the commonly used mainframes that need to control the hydraulic system, we should select the appropriate liquid source circuit according to the requirements of the next situation. On this basis, analyze the characteristic parameters of the system, and then consider the main in the hydraulic source circuit. The control form of the parameters, under the premise of meeting the working conditions, has been carefully revised to design a hydraulic system with safety, reliability, energy efficiency and low price. 2, typical hydraulic source circuit and hydraulic source circuit with accumulator performance compared to a typical hydraulic source, see the hydraulic source circuit with accumulator see 2.

Connected control, the road 2 kinds of loops from the surface is just the difference between the accumulators, after careful research and development of the two loops, the performance difference is very large.

The accumulator acts as an energy storage device in the hydraulic source circuit. Its main purpose is to serve as an auxiliary oil source. This circuit is often used in hydraulic systems in intermittent operation conditions. The accumulator is installed in the hydraulic source circuit and is being reduced. Hydraulic pump specifications, reducing the driving power of the hydraulic pump, saving energy, reducing noise, eliminating pulsation, reducing equipment operating costs, etc. are very obvious. On the other hand, it is also possible to improve the safety of the hydraulic system. The transmission and control of the hydraulic system in the direction of research and development, research and design dependability, when a fault or power failure occurs, it can also be used as an emergency power source to promote the recovery of the host to a safe state and avoid the occurrence of major accidents. 3 Two kinds of hydraulic source circuits Flow calculation method and energy-saving analysis The hydraulic source circuit with accumulator has the outstanding advantages that the typical hydraulic source circuit can't match. For the intermittent operation, the hydraulic system that provides a large flow of transients is in a project. The selection and calculation results of hydraulic flow are not the same. For example, for a certain oil gas plant, the liquid card system of the (1) gas generator is said to be from high pressure still = 8, the minimum working pressure is 1 = 6.5, the mountain work cycle is 3, and the system has 8 branches. The road controls the movement of 21 hydraulic cylinders. There are two branches in the system at the same time. At this time, the system has a large flow of 0, 1=264. At this moment, the maximum oil volume required for the operation of the liquid cylinder is 16.4 working cycles. The volume of the oil is 86 14 艮 according to the above conditions, respectively, the calculation of the flow rate of the hydraulic pump of the typical hydraulic source circuit can be calculated according to the known conditions, using the following formula to calculate the flow rate of the hydraulic pump flow M.lmiM. Should be regular!

=300 will know the maximum working pressure of the system is still = 8 river, the driving power of the mountain mill hydraulic pump depends on the motor standard to the 55 1 tear.

The calculation of the hydraulic pump flow rate of the hydraulic source circuit with the accumulator can be based on the known conditions, the sum of the oil liquid 所需 required for the hydraulic cylinder to operate in a working cycle, T, the time required for one working cycle. 1K leakage loss coefficient, taken as 1.2 according to the calculation results of the hydraulic pump flow gauge, in order to substitute the known conditions into the hydraulic pump power calculation formula hydraulic pump drive power, according to the motor standard on the 7.5 1 = when the system 2 roads Same, action, the maximum effective volume required is 16., can be instantaneously provided by the accumulator, substituting the known condition into the accumulator volume calculation formula Vx accumulator effective working volume Pi system minimum working card force, 13 P2 system The highest working pressure, PO accumulator inflation pressure should be in! In the range of 0.25 points, according to the calculation, the 40 solvate 3 is used as the body 120 120 is greater than the calculation result to meet the system requirements. After the effective working volume of the solvent 120 is 19.8, in the working condition accounting, Effective check of each condition in the pairwise work cycle. That is, every time, the amount of liquid pumped to the accumulator and the release of the pedicle to the system, including the internal leakage of the system, when the accumulator can provide sufficient pressure in the system working cycle according to the working conditions. . In the case of the flow check by the hydraulic source, the juice calculation and the selection of the solute line are checked in the design.

Model volume effective volume From the above calculations, it is not difficult to see that the two oil source circuits have different results in the selection of hydraulic pump flow and motor power. The oil source circuit with accumulator can reduce the output flow of the hydraulic pump by 260. The drive power of the machine can also be reduced by 47.5 阢. According to the implementation year of this scheme, only one item of electricity can be saved up to 27, which is the economic benefit and social benefit. 4 The design of the new hydraulic source circuit and the study of the liquid music source circuit with accumulator. It can be seen from the analysis and calculations that the advantages are very obvious, but the loop also has its own limitations. For example, the price of the accumulator is relatively hot and the effective volume is small, which is caused by the increase in the number of uses. The secondary investment is large, and the volume and weight of the equipment are increased. How to improve the effective volume of the accumulator becomes a subject of research and development, and a large number of design manuals and materials for hydraulics at home and abroad are consulted. No effective solutions were found. After the 夂 夂 宄 宄 宄 宄 蓍 蓍 蓍 蓍 蓍 蓍 蓍 蓍 蓍 蓍 容积 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效 有效By dividing the prayer, the number of molecules can be increased as long as the value of the item is reduced, that is, the difference between the working pressure point and the lowest working pressure 0, that is, the value of the factory 21 is increased, and the accumulator is The effective volume can follow, fire. When the digit of =72 is increased from 20 to 20, the effective volume of the accumulator will be doubled. In the other painting, when the denominator of the score is reduced, the value of the score is increased, that is, when the minimum working pressure is constant, the inflation pressure value is increased, the denominator value in the score is decreased, and the score is increased. However, it should be noted that the highest inflation pressure network should meet the accumulator inflation pressure conditions outside of 0.25. Research and development of inflatable music. Increased from 071 to printed or by. When 8;7 is added to 0.9 column, the effective volume core value of the accumulator can be increased on the original basis. Through the above analysis, the effective volume of the accumulator is improved along with the hydraulic source circuit with accumulator in engineering design. Continuous application, for some intermittent operation conditions, and low pressure and large flow hydraulic system, using the above research results to design a new type of hydraulic source circuit with accumulator see 3, and supporting the production of a series of accumulators The valve group provides an effective design solution for increasing the value, reducing the number of accumulators, reducing the manufacturing cost and reducing the volume and weight of the hydraulic equipment. The following examples illustrate the use of the new hydraulic source circuit. When the minimum working pressure of the hydraulic cylinder is 2, the maximum working pressure is 2.4, the oil source uses 40 Panergy 2 accumulator light effect volume is checked 1 is 12.5 adopting new liquid card source road, set, 1=2.2 still = effect The volume is increased to 33.38 B. The effective volume is increased by 20.88. Therefore, the new hydraulic source circuit scheme can be used to achieve the effective volume value provided by the original solution of only 40 actuators with only 2 16 accumulators.

5 Conclusion The effect of using this technology on the accumulator station in large hydraulic system is very obvious. This technology has been verified by domestic multi-process, and the energy-saving and compatibilizing effect is remarkable, making the accumulator station Sexual investment has been reduced by more than 60 on the original basis, and the economic and social benefits are remarkable. The new technology is widely used.

1 Northeast Institute of Technology manual writing group. Mechanical parts design manual continued elbow. Beijing Metallurgical Industry Press, 1979 2 Song Xueyi. Pocket hydraulic and pneumatic manual elbow. Beijing Machinery Industry Press.

3 Xu, mechanical design manual. Beijing Machinery 1 Industry Co., Ltd. 1稂

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